Why is the Democratic Party sometimes referred to as the "Tax and Spend" party?

A. The party advocates for highter taxes and more governmental spending.
B. The party believes the economy will improve with lower taxes and less spending.
C. The party created the taxation requirements for the Customer Price Index.
D. The government is only in deciding when the Democrats are in power.

I need help, I know that D is NOT right. I'm not sure what the Customer Price Index, but it seems as if that isn't the answer either. I'm leaning towards A or B. I was thinking that Dems want to lower taxes and have the government spend more, but all the options are conflicting with that. Please help me understand, I'm not here for it to be answered, I want a short explanation.